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Table 4-49. Exhaust Valve Seat Inserts and Counterbores Wear Limits
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TM-9-2815-210-34-2-2 Engine Assembly Diesel (MULTIFUEL): Naturally Asspirated or Turbocharged Fuel-Injected Water-Cooled 6-Cylider Manual
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Valves
TM 9-2815-210-34-2-2
FRAME 24
NOTE
T w o sizes of exhaust valve seat inserts (1) are used
in these cylinder heads (2). Standard size exhaust
v a l v e s seat inserts go in standard size exhaust valve
s e a t c o u n t e r b o r e s ( 3 ) .  For
0.0100-inch
oversize
exhaust valve seat centerbores, use 0.0100-inch
oversize exhaust valve seat inserts.
Put each e x h a u s t valve seat insert (1) in dry ice for four hours so it will
1.
shrink.
NOTE
Exhaust valve seat insert (1) must be put in its exhaust
v a l v e seat counterbore (3) right after it is taken out of
d r y i c e .  I f exhaust valve seat insert is left out too
l o n g , it will get bigger and will not fit.
2.
P u t exhaust valve seat insert (1) in place
on its exhaust valve seat counter-
b o r e ( 3 ) , b e v e l e d e d g e f a c i n g o u t .  Using
soft-faced hammer and exhaust
v a l v e seat replacer, put new exhaust valve
seat insert into its exhaust
v a l v e s e a t c o u n t e r b o r e .  T a g new exhaust
valve seat inserts for lapping by
m a c h i n e shop,
S e n d cylinder head (2) to machine shop along with intake and exhaust valves
3.
w h i c h seat against new intake and exhaust valve seat inserts.  Tell machine
shop to lap new intake and exhaust valve seats to the valves that seat
against them.
END OF TASK
4-237

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